Replace travis with workflows, add 3.9 and remove 3.6

.github/workflows/lint.yml

@@ -0,0 +1,43 @@
+name: Black
+
+on:
+  push:
+    branches:
+      - master
+      - dev
+  pull_request:
+    branches:
+      - master
+      - dev
+  workflow_dispatch:
+  schedule:
+    - cron: "0 5 * * 6"  # 5:00 UTC every Saturday
+
+jobs:
+  run-linters:
+    name: Run linters
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Check out Git repository
+        uses: actions/checkout@v2
+
+      - name: Set up Python
+        uses: actions/setup-python@v1
+        with:
+          python-version: 3.9
+
+      - name: Install Python dependencies
+        run: pip install black flake8
+
+      - name: Run linters
+        uses: samuelmeuli/lint-action@v1
+        with:
+          github_token: ${{ secrets.github_token }}
+          # Enable linters
+          black: true
+          flake8: false
+          # Mark the following line true if you want linters to attempt to autocorrect your code
+          auto_fix: false
+          git_name: "Greene Lab Linter"
+          git_email: "[email protected]"

.github/workflows/packaging.yml

@@ -0,0 +1,37 @@
+name: packaging
+
+on:
+  # Make sure packaging process is not broken
+  push:
+    branches: [master, dev]
+  pull_request:
+  # Make a package for release
+  release:
+    types: [published]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+    strategy:
+      max-parallel: 4
+      matrix:
+        python-version: [3.9]
+
+    steps:
+    - uses: actions/checkout@v1
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v2
+      with:
+        python-version: ${{ matrix.python-version }}
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip setuptools setuptools_scm twine wheel
+    - name: Create packages
+      run: python setup.py sdist bdist_wheel
+    - name: Run twine check
+      run: twine check dist/*
+    - uses: actions/upload-artifact@v2
+      with:
+        name: tox-gh-actions-dist
+        path: dist

.github/workflows/tox_checks.yml

@@ -0,0 +1,54 @@
+# NB: this name is used in the status badge
+name: tox checks
+
+on:
+  push:
+    branches:
+      - master
+      - dev
+  pull_request:
+    branches:
+      - master
+      - dev
+  workflow_dispatch:
+  schedule:
+    - cron: "0 5 * * 6"  # 5:00 UTC every Saturday
+
+jobs:
+  lint:
+    name: ${{ matrix.toxenv }}
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        toxenv:
+          - clean
+          - check
+          - docs
+
+    steps:
+      - name: Git clone
+        uses: actions/checkout@v2
+
+      - name: Set up Python ${{ env.default_python || '3.9' }}
+        uses: actions/setup-python@v2
+        with:
+          python-version: "${{ env.default_python || '3.9' }}"
+
+      - name: Pip cache
+        uses: actions/cache@v2
+        with:
+          path: ~/.cache/pip
+          key: ${{ runner.os }}-pip-${{ matrix.toxenv }}-${{ hashFiles('tox.ini', 'setup.py') }}
+          restore-keys: |
+            ${{ runner.os }}-pip-${{ matrix.toxenv }}-
+            ${{ runner.os }}-pip-
+
+      - name: Install dependencies
+        run: |
+          python -m pip install -U pip
+          python -m pip install -U setuptools wheel
+          python -m pip install -U tox
+
+      - name: Run ${{ matrix.toxenv }}
+        run: python -m tox -e ${{ matrix.toxenv }}

.github/workflows/tox_pytests.yml

@@ -0,0 +1,45 @@
+name: tox pytests
+
+on:
+  push:
+    branches:
+      - master
+      - dev
+  pull_request:
+    branches:
+      - master
+      - dev
+  workflow_dispatch:
+  schedule:
+    - cron: "0 5 * * 6"  # 5:00 UTC every Saturday
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: [3.7, 3.8, 3.9]
+
+    steps:
+    - uses: actions/checkout@v1
+    - name: Install xmllint
+      run: sudo apt install coinor-cbc
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v2
+      with:
+        python-version: ${{ matrix.python-version }}
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install tox tox-gh-actions coverage coveralls
+    - name: Test with tox
+      run: tox
+
+    - name: Check test coverage
+      run: coverage report -m --fail-under=${{ matrix.vcs == 'bzr' && 89 || 90 }}
+
+    - name: Report to coveralls
+      run: coveralls
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        COVERALLS_SERVICE_NAME: github

ci/bootstrap.py

@@ -53,7 +53,6 @@ def main():
     import jinja2
     import matrix
 
-
     print("Project path: {0}".format(base_path))
 
     jinja = jinja2.Environment(
@@ -101,4 +100,3 @@ def main():
     else:
         print("Unexpected arguments {0}".format(args), file=sys.stderr)
         sys.exit(1)
-

docs/conf.py

@@ -5,50 +5,50 @@
 
 
 extensions = [
-    'sphinx.ext.autodoc',
-    'sphinx.ext.autosummary',
-    'sphinx.ext.coverage',
-    'sphinx.ext.doctest',
-    'sphinx.ext.extlinks',
-    'sphinx.ext.ifconfig',
-    'sphinx.ext.napoleon',
-    'sphinx.ext.todo',
-    'sphinx.ext.imgmath',
-    'sphinx.ext.viewcode',
+    "sphinx.ext.autodoc",
+    "sphinx.ext.autosummary",
+    "sphinx.ext.coverage",
+    "sphinx.ext.doctest",
+    "sphinx.ext.extlinks",
+    "sphinx.ext.ifconfig",
+    "sphinx.ext.napoleon",
+    "sphinx.ext.todo",
+    "sphinx.ext.imgmath",
+    "sphinx.ext.viewcode",
 ]
-source_suffix = '.rst'
-master_doc = 'index'
-project = 'oemof.solph'
-year = '2014-2020'
-author = 'oemof-developer-group'
-copyright = '{0}, {1}'.format(year, author)
-version = release = '0.4.2.dev0'
-
-pygments_style = 'trac'
-templates_path = ['.']
+source_suffix = ".rst"
+master_doc = "index"
+project = "oemof.solph"
+year = "2014-2020"
+author = "oemof-developer-group"
+copyright = "{0}, {1}".format(year, author)
+version = release = "0.4.2.dev0"
+
+pygments_style = "trac"
+templates_path = ["."]
 extlinks = {
-    'issue': ('https://github.com/oemof/oemof-solph/issues/%s', '#'),
-    'pr': ('https://github.com/oemof/oemof-solph/pull/%s', 'PR #'),
+    "issue": ("https://github.com/oemof/oemof-solph/issues/%s", "#"),
+    "pr": ("https://github.com/oemof/oemof-solph/pull/%s", "PR #"),
 }
 # on_rtd is whether we are on readthedocs.org
-on_rtd = os.environ.get('READTHEDOCS', None) == 'True'
+on_rtd = os.environ.get("READTHEDOCS", None) == "True"
 
 if not on_rtd:  # only set the theme if we're building docs locally
-    html_theme = 'sphinx_rtd_theme'
+    html_theme = "sphinx_rtd_theme"
 
 html_use_smartypants = True
-html_last_updated_fmt = '%b %d, %Y'
+html_last_updated_fmt = "%b %d, %Y"
 html_split_index = False
 html_sidebars = {
-    '**': ['searchbox.html', 'globaltoc.html', 'sourcelink.html'],
+    "**": ["searchbox.html", "globaltoc.html", "sourcelink.html"],
 }
-html_short_title = '%s-%s' % (project, version)
+html_short_title = "%s-%s" % (project, version)
 
 napoleon_use_ivar = True
 napoleon_use_rtype = False
 napoleon_use_param = False
 
-exclude_patterns = ['_build', 'whatsnew/*']
+exclude_patterns = ["_build", "whatsnew/*"]
 
 linkcheck_ignore = [r"https://requires.io/.*"] + (
     [

pyproject.toml

@@ -0,0 +1,19 @@
+[tool.black]
+line-length = 79
+target-version = ['py37', 'py38']
+include = '\.pyi?$'
+exclude = '''
+/(
+    \.eggs
+  | \.git
+  | \.hg
+  | \.mypy_cache
+  | \.tox
+  | \.venv
+  | _build
+  | buck-out
+  | build
+  | dist
+  | ci
+)/
+'''

setup.cfg

@@ -4,6 +4,7 @@ universal = 1
 [flake8]
 max-line-length = 79
 exclude = */migrations/*, docs/conf.py
+ignore = E203, W503
 
 [pydocstyle]
 ignore = D200, D203, D213, D406, D407